## Gaussian beam scattering from a dielectric cylinder, including the evanescent region

JOSA A, Vol. 26, Issue 12, pp. 2558-2566 (2009)

http://dx.doi.org/10.1364/JOSAA.26.002558

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### Abstract

The scattering of a two-dimensional Gaussian beam from a homogeneous dielectric cylinder is analyzed using a plane-wave spectrum. Special attention is given to the computation of the evanescent field of the beam and its effect in the scattering. A comparison is made between the evanescent field in Cartesian coordinates and in cylindrical coordinates as a sum of cylindrical waves. The field given by the cylindrical wave equation is found to converge spatially as we include more Bessel modes. The evanescent field incident on the dielectric cylinder is found to cause radiating waves to form and propagate outward.

© 2009 Optical Society of America

**OCIS Codes**

(260.2110) Physical optics : Electromagnetic optics

(290.0290) Scattering : Scattering

**ToC Category:**

Scattering

**History**

Original Manuscript: August 31, 2009

Revised Manuscript: October 7, 2009

Manuscript Accepted: October 9, 2009

Published: November 9, 2009

**Citation**

Peter Pawliuk and Matthew Yedlin, "Gaussian beam scattering from a dielectric cylinder, including the evanescent region," J. Opt. Soc. Am. A **26**, 2558-2566 (2009)

http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-26-12-2558

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